\begin{table}

\caption{\label{tab:pm_senate_naics3}\textbf{PanelMatch Coefficient Estimates for Senate, Matching on Politician and NAICS 3-Digit Industry}: This table reports the estimated coeficients
and associated standard errors, computed based on a block-bootstrap procedure, which are used
to produce Senate results as in Figure 4, matching on both  politician and NAICS 3-digit industry. The number of observations is  3,058,224 dyads in the Senate. To compute the Senate results, we
identified all dyads where a particular company donated to a particular politician for the first
time in at least three years. For the Senate, there are 3,778 such instances}
\centering
\begin{tabu} to \linewidth {>{\raggedright}X>{\centering}X>{\centering}X>{\centering}X>{\centering}X}
\hline
\multicolumn{1}{c|}{\em{ }} & \multicolumn{4}{c}{\em{Dependent Variable:}} \\
\cline{2-5}
\multicolumn{1}{c|}{ } & \multicolumn{4}{c}{Estimated Effect of Donation on Probability to Lobby in:} \\
Chamber & \textit{t+0} & \textit{t+1} & \textit{t+2} & \textit{t+3}\\
\hline
\textit{Senate} & 0.056 & 0.07 & 0.071 & 0.07\\
\hline
 & (0.0055) & (0.0063) & (0.0069) & (0.0071)\\
\hline
\multicolumn{5}{l}{\rule{0pt}{1em}\textit{Note: } Std. errors in parentheses}\\
\end{tabu}
\end{table}
